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Book Dissertation Abstracts International

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1993-11 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstracts of dissertations available on microfilm or as xerographic reproductions.

Book Isokinetic Exercise and Assessment

Download or read book Isokinetic Exercise and Assessment written by David H. Perrin and published by . This book was released on 1993 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Isokinetic Exercise and Assessment not only presents a scientific basis for the use of isokinetics, it also provides practical guidelines for applying isokinetics in clinical practice. This approach, plus the book's extensive normative value tables, makes it a suitable textbook and reference for students and practitioners of athletic training, physiotherapy, rehabilitation medicine, and strength training.

Book The Effects of Limited Range of Motion Isokinetic Knee Extensor Training on Isometric Strength Development Inside and Outside of the Trained Range of Motion

Download or read book The Effects of Limited Range of Motion Isokinetic Knee Extensor Training on Isometric Strength Development Inside and Outside of the Trained Range of Motion written by Jennifer L. Donner and published by . This book was released on 1992 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The purpose of this study was to determine the effects of limited range of motion (ROM) isokinetic knee extensor exercise on isometric strength development inside and outside the trained ROM. Four male and 18 female volunteers between the ages of 20 and 48 years were randomly assigned to one of two groups. The experimental group trained the knee extensors isokinetically on the KINCOM from 45 to 0 degrees of knee flexion three times a week for five weeks. The control group did not train. Both groups were pretested and posttested on the KINCOM for isometric knee extensor peak torque at 15, 25, 35, 55, 65 and 75 degrees of knee flexion. One half of the subjects in each group was tested at each angle in ascending order, while the other half was tested in descending order. The two orders of testing were randomly assigned and balanced over subjects with a matching procedure. Repeated-measures ANOVA with one between groups factor was used to determine if significant differences existed between the groups. Tukey's Honestly Significantly Different test was used to make pairwise comparisons between group means at each angle. Upon statistical analysis it was determined that no significant differences existed between the groups at each angle of measurement except at 75 degrees of knee flexion (p

Book An Investigation of the Relationship Between Impact Force Attenuation in Landing and Isokinetic Strength of Knee Muscles in Individuals with Different Training Backgrounds

Download or read book An Investigation of the Relationship Between Impact Force Attenuation in Landing and Isokinetic Strength of Knee Muscles in Individuals with Different Training Backgrounds written by and published by . This book was released on 2008 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Skeletal muscle is a major active mechanism of impact force attenuation in human movement. During the landing phase impact attenuation is achieved through eccentric contraction of the muscles of the lower extremity. However, few studies have investigated the effects of knee strength, especially eccentric strength, on impact attenuation during landing. Therefore the relationship was assessed in fourteen healthy, male volunteers. Seven NCAA Division I College football players (TRAINED) and seven recreationally active university students with limited sport training or competitive sport background (REC) participated in two testing sessions. Isokinetic testing of the knee extensor and flexor muscles was performed concentrically at 60 and 180 degree·sec−1, and eccentrically at 60 degree·sec−1. 3D kinematic and ground reaction force (GRF) data were collected during drop landings from heights of 40, 60cm and 100% of each individuals maximum jump height. The TRAINED had greater concentric strength, vertical jump height, but no significant differences existed in the eccentric strength (336 vs 340 N.m/kg) between the groups. The TRAINED had marginally greater peak GRFs (2.7 & 3.5 BW vs 2.0 & 2.7 BW for 40 and 60 cm, p=0.051) and significantly less time to the peak (0.048 & 0.043 s vs 0.060 & 0.053) compared to the REC in drop landing. The TRAINED used less but non-significant knee flexion range of motion ( -60.7 & -54.1 degree vs -62.7 & -69.6 degree) during drop landing than the REC. There were high, positive and significant correlations between the peak eccentric knee extensor torque and time to the first and second peak GRF. Despite all their training the results did not find any significant differences in eccentric strength of the TRAINED subjects in comparison to their REC counterparts. The TRAINED subjects adopted a stiffer landing strategy to deal effectively with high impact loading during landing. Future research is warranted in investigating impact attenuation in landing of participants with significantly different eccentric strength.

Book Effect of Slow Velocity Isokinetic Knee Actions on Slow and Fast Velocity Contralateral Knee Action Performance

Download or read book Effect of Slow Velocity Isokinetic Knee Actions on Slow and Fast Velocity Contralateral Knee Action Performance written by Colin Arthur Duffett and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue is a complex, multifactorial phenomenon that affects the neuromuscular system from the muscle fibers and neuromuscular junction to the higher planning centers in the brain and reflects interactions along the entire system. 'Neuromuscular fatigue' refers to the decrease in physical performance associated with an increase in the real and/or perceived difficulty of a task, regardless if the force or power can be sustained, and is present and progressing from the onset of the task that is reversible with rest. It consists of central and peripheral components such as decreases in central drive (central fatigue) or contractile responses (peripheral fatigue) and is suggested to occur at any site involved in the muscle contraction. Fatigue also has a mental component that describes an emotion suggested to act as a warning sign for maintaining physical integrity. Neuromuscular fatigue may depend on both the muscles employed and on the type of exercise from which fatigue results and are specific to the task and dependent on the mechanisms which are the most stressed during the task. Fatigue can either be localized or global, meaning it can affect the muscles exercised or the entire body system resulting in fatigue effects in non-exercised muscle groups. A growing body of research revolves around the effects of fatiguing exercise and their impact on the performance of non-exercised muscles, termed non-local muscle fatigue (NLMF). The presence of NLMF effects is conflicting, with effects seemingly dependent on many factors such as contraction intensity, fatiguing exercise volume, muscle group fatigued and tested, muscle action, and the detection method(s) used. NLMF research has many implications for rehabilitation and training purposes, as well as widening our understanding of global fatigue mechanisms. A relatively unexplored aspect of NLMF is whether the testing is velocity specific. The purpose of this study was to investigate the effects of fatigue induced by simultaneous low velocity unilateral isokinetic knee extensions and flexions on contralateral knee slow and fast velocity extensor and flexor isokinetic force and electromyography (EMG). In a randomized, repeated measures, crossover design, peak torque, EMG, and rate of perceived exertion measures were measured from the non-dominant vastus lateralis and biceps femoris before and after unilateral fatiguing protocols of the dominant knee extensors and flexors. The fatiguing protocols consisted of 4 sets of 15 maximal isokinetic knee extension and flexion contractions. In addition, a fatigue resistance test was also completed post-intervention. The current study used 16, university-aged (ages 18-30) participants (10 males and 6 females) who were resistance trained. Peak torque of the dominant (exercised) quadriceps and hamstrings decreased when tested at slow and high velocities. Peak torque of the non-dominant quadriceps and hamstrings during post-test (p=0.6 and p=0.3 respectively), or first or last repetition of repetitive fatigue test (p=0.8, p=0.06, and p=0.8, p=1.0, respectively) tested at slow velocity was not significantly different from control, demonstrating a lack of peak torque or fatigue endurance NLMF effects. In addition, there was no relative (normalized) differences in peak torque for velocity specific or fast test velocities. However, the fast velocity repetitive fatigue test resulted in a greater decrease from first to the last repetition than the slow test, as demonstrated by the fatigue index (FI), but was not significantly different from control. This study highlights that prior unilateral fatigue of the dominant quadriceps and hamstrings by repetitive slow maximal isokinetic actions did not demonstrate decreases in singular maximal peak torque or repetitive fatigue endurance in the contralateral muscles. In addition, velocity specific effects were not demonstrated in relative peak torque or relative fatigue endurance changes. There was also no observable effect on the rating of perceived exertion following control vs fatigue (4.6 vs 6.3, p>0.05), or slow vs. fast testing (5.8 vs 6.8, p>0.05) on post-repetitive test values.

Book The effects of static and PNF stretching on knee extensor and knee flexor peak torque values in female athletes

Download or read book The effects of static and PNF stretching on knee extensor and knee flexor peak torque values in female athletes written by Jiajia Sun and published by . This book was released on 2011 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Influence of Warm up on Peak Torque Production of Knee Flexor and Extensor Muscles

Download or read book The Influence of Warm up on Peak Torque Production of Knee Flexor and Extensor Muscles written by Manijeh Gariei and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Generalizability of Isokinetic concentric Measurements of Knee Extension and Flexion Peak Torque Total Work and Average Power

Download or read book Generalizability of Isokinetic concentric Measurements of Knee Extension and Flexion Peak Torque Total Work and Average Power written by Jody Carl Andersen and published by . This book was released on 1992 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effect of the Anderson Knee Stabler the McDavid Knee Guard and the Donjoy Knee Defender on Peak Torque Average Torque Range of Motion and Peak Velocity

Download or read book The Effect of the Anderson Knee Stabler the McDavid Knee Guard and the Donjoy Knee Defender on Peak Torque Average Torque Range of Motion and Peak Velocity written by Nadine De Freitas and published by . This book was released on 1987 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Effect of Visual Feedback on Concentric Peak Torque Production During Knee Extension and Flexion Exercise

Download or read book Effect of Visual Feedback on Concentric Peak Torque Production During Knee Extension and Flexion Exercise written by Edward R. Gasiewski and published by . This book was released on 1993 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effects of an Increase in Knee Joint Range of Motion on the Isometric Torque Production of the Hamstring Muscles

Download or read book The Effects of an Increase in Knee Joint Range of Motion on the Isometric Torque Production of the Hamstring Muscles written by Tim Ogletree and published by . This book was released on 1991 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: